Methods Of Heat Transfer Flashcards
What is the ability to do work or cause change?
Energy
Give 3 examples of how industry uses heat.
Weld and cut metals
Manufacture paper, glass, and textiles
Shape plastics
What is heat?
A form of energy
What is a measure of the amount of energy transferred?
Work
What is the force a falling object can exert when it falls?
Positional potential energy
What is the energy stored in food, batteries, or fuels?
Chemical energy
What is the energy an object has due to its motion?
Kinetic energy
The movement of what is a type of kinetic energy?
Particles
What is kinetic energy of particles and potential energy?
Internal energy
How is energy measured?
Joules
Heat is the —— energy transferred from one object to another as a result of the difference in —— between the two objects.
Internal, temperature
What is the average measure of kinetic energy possessed by moving particles.
Temperature
More particle movement = ——- temperature
High
Less particle movement = —— temperature
Low
What happens when a hot substance comes in contact with a cold substance? Why?
They reach the same temperature because the heat from the hot object is transferred to the cold object.
Heat flows from —– to —– temperatures, resulting in room temperature.
Hot, cold
How does water behave at 0 degrees C? At 100 degrees C?
0 - water freezes
100 - water boils
What is the transfer of energy through contact?
Conduction
Explain how kinetic energy is transferred from particle to particle through conduction.
When a solid heats and gains kinetic energy, the particles move more vigorously (faster) and passes its energy to the neighboring particles.
What materials are good conductors?
Metals, silver, copper
What materials are poor conductors?
Plastic, glass, wood, fabrics
—– are poor conductors and are used in everyday materials.
Insulators
What is the method by which heat travels through fluids?
Convection
During convection, —– decreases and —– rises.
—– fluid rises and —– fluid sinks.
Density, matter
Hot, cold
How are off shore breezes and convection related?
The cold air from the land goes to the warmer water. The water warms the air causing it to rise. The cooler air moves in to replace it.
What is heat transfer through electromagnetic radiation?
Radiation
True or False - Infrared rays can travel through the vacuum of space?
True
What color is best to absorb radiation?
Black
Which color is best to reflect radiation?
White
Which material is used best for insulation of radiation?
Glass/shiny metal
What is the capability of an object to absorb energy in the form of heat for a given increase in temperature?
Specific heat
Specific heat involves the number of —– of energy per —– of a substance to increase an object one degree —–.
Joules, gram, Celsius
What is the total amount of heat stored; it is sensitive to size?
Thermal capacity
